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SA818Pro : 1W Embedded Walkie Talkie Module With LNA & Voice/Data
Output Power: 1W/500mW
Certification: FCC ID/CE-RED
Type: Analog Walkie Talkie
Size (mm):35.60 * 19.00 * 3.20
HOME > PRODUCTS > WALKIE TALKIE MODULES > SA828PRO FULL-FEATURED WALKIE TALKIE MODULE
SA828Pro Full-featured Walkie Talkie Module
SA828Pro is a highly cost-effective, full-featured walkie talkie module .It supports both voice and data communication modes. It integrates a high-speed microcontroller, a high-performance RF transceiver chip, and an RF power amplifier.All parameters(CTCSS, CDCSS, SQ, Predefined channels etc.) can be easily modified by PC software, Users only need to add external power supply, speaker, and audio taper, then it becomes a miniature walkie talkie with 16 adjustable channels. Simplified interface and Ultra small size make this module widely used in various applications and conveniently embedded into various handheld. SA828Pro is manufactured and tested using a strictly lead-free process and complies with RoHS and REACH standards.
Parameter | Test condition | Min | Typ. | Max | Unit |
Power supply | 3.3 | 4.2 | 5.5 | V | |
Working Temperature range | -30 | 25 | 70 | ℃ | |
Current Consumption | |||||
Sleep current | ≤45 | uA | |||
RX current | <80 | mA | |||
TX current（High power） | @4.0V,32dBm | 900 | 1000 | mA | |
TX current（Low power） | @4.0V,27dBm | 500 | 600 | mA | |
Transmitting RF Parameters | |||||
Frequency range | UHF | 400 | 450 | 480 | MHz |
VHF | 134 | 150 | 174 | MHz | |
Out power（high power） | @VCC=4.0V | 31 | 32 | 33 | dBm |
Out power（low power） | 26 | 26.5 | 27.5 | dBm | |
modulation sensitivity | @1.5KHz/2.5KHz Frequency deviation | 10 | mV | ||
Audio distortion | @1.5KHz/2.5KHz Frequency deviation | 2 | 5 | % | |
Signal to noise ratio | @1.5KHz/2.5KHz Frequency deviation | 38 | 40 | 45 | dB |
Adjacent-channel power | @12.5K offset | -60dBc | dBm | ||
CTCSS modulated frequency deviation | 0.35 | 0.5 | 0.75 | KHz | |
RX frequency Parameter | |||||
RX sensitivity | 13dBm output voice signal-to-noise ratio (SNR) | -124 | dBm | ||
RX SNR | @1.5KHz Frequency deviation | 45 | 50 | dB | |
Audio output power | 2 | W | |||
Audio output impedance | 8 | OHm | |||
Features of walkie talkie module SA828Pro
UHF Frequency : 400~480 MHz
VHF Frequency :134~174 MHz
(2 frequency bands are optional)Tx and Rx frequency can be set alone
Bandwidth 12.5 / 25 KHz
High/ low power is optional（500mW/1.5W@4.0V）
Distance up to 4-5km in open area
High Sensitivity：-124 dBm
High-integrated, Small Size
38 CTCSS (can be set via PC software and serial port)
166 CDCSS (can be set via PC software and serial port)
8 level squelch
Wide range of working voltage 3.3-5.5 V
External potentiometer to adjust volume
1 ppm KDS TCXO crystal, Stable performance
Application of walkie talkie module SA828Pro
- Small walkie talkie
- Invisible intercom system
- audio surveillance system
- Outdoor Sport products
- building community security system
Pin NO. | Pin name | Description |
1 | MIC_in | External audio signal can be connected; signal amplitude should not exceed 200 mVpp |
2 | GND | Connect to the negative terminal of the power supply |
3 | VOXEN | VOX enable , 0: enable VOX; leave open or 1 to disable VOX |
4 | 1 | Encoding for 16 channel, 4bit organized the 16 channels. For example, if the bit is : 0110, it is channel 6. If it is 1001, it is channel 9. The Pin marked 8 means the maximum bit. The Pin marked 1 means the lowest bit. |
5 | 2 | |
6 | 8 | |
7 | 4 | |
8 | H/L | High/low output power control; Leave open for high output power，low level to low output power. |
9 | SPKEN | Receive signal indicatie Pin, usually low level, turn high after receiving signal |
10,11,13,21 | GND | Exposed ground pad |
12 | ANT | Output for RF signal, External connect antenna with 50ohm |
14,15 | SPK | Output for Audio, External connect loudspeaker with 8 ohm /2W |
16,17 | VOL | Audio volume control, External connect 100K ohm rotary resistor |
18 | RXD | RXD of the module for UART, connect to TXD outside of the module |
19 | TXD | TXD of the module for UART, connect to RXD outside of the module |
20 | PTT | PTT of the walkie-talkie module, leave open or “1” is Rx, “0”is TX, Default receiving mode |
22 | VCC | External connect Positive supply 3.3~5V. |
23 | CS | “0” is for sleeping mode,”1” for normal working,， Default normal operation |
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